Tub



FIG. 1 is a top left perspective view of a tub in accordance with the present design;

FIG. 2 is a top right perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front view thereof; the rear view being the same;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left side view thereof. 

The ornamental design for a tub, as shown and described. 